روش SVPWM تحمل خطا برای خطاهای سوئیچ‌باز چندگانه در مبدل توربین بادی شش‌فاز
محورهای موضوعی : انرژی های تجدیدپذیر
روح اله بلبل نیا
1
(دانشکده مهندسی برق- دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران)
کریم عباس زاده
2
(دانشکده مهندسی برق- دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران)
کلید واژه: توربین بادی, تحمل خطا, مدولاسیون پهنای پالس بردار فضایی, خطای کلید باز چندگانه, مبدل شش فاز,
چکیده مقاله :
با توجه به افزایش استفاده از انرژی باد و تاثیر قابل توجه آن بر شبکه قدرت، تحمل خطا در توربین بادی برای افزایش قابلیت اطمینان و سطح در دسترس بودن آن ضروری است. در این مقاله، یک روش جدید تحمل خطای کلید باز چندگانه برای مبدل AC-DC شش‌فاز، به‌عنوان آسیب‌پذیرترین قسمت سیستم توربین بادی ارایه شده است. روش پیشنهادی تحمل خطا از حالت افزونگی بردارهای فضایی مبدل شش‌فاز در مدولاسیون پهنای پالس بردار فضایی (SVPWM) استفاده نموده است و با تغییر سیگنال‌های کلیدزنی در ناحیه‌های خطادار، بردار فضایی دیگری را جایگزین بردار فضایی مطلوب نموده تا از ایجاد بردار فضایی نامطلوب براثر خطا کلید باز جلوگیری شود. مزیت اصلی روش پیشنهادی این است که بدون افزودن پایه، کلید یا تریاک (TRIAC)، به مدار مبدل و همچنین بدون نیاز به محاسبات پیچیده، خطاهای کلید باز مبدل را تحمل نموده و مقدار اضافه جریان و مقدار اعوجاج هارمونیک کل (THD) ناشی از این خطاها را در فازهای سالم و خطادار کاهش داده است. در نهایت روش پیشنهادی تحمل خطا با شبیه‌سازی در محیط سیمولینک نرم‌افزار متلب ارزیابی شده و نتایج حاصل از این شبیه‌سازی جهت تایید اثر بخشی آن ارائه شده است.
Due to the rapid growth of wind energy and its significant effect on the power grid, fault-tolerant in wind turbines is considered crucial to increase their reliability and availability levels. This paper presents a fault-tolerant technique for multiple open-switch faults in a six-phase AC-DC converter as the most vulnerable components of the wind turbine system. The proposed fault-tolerant technique uses the redundancy mode of six-phase space vectors in space vector pulse width modulation (SVPWM) and changes the switching signals in fault sectors, replacing the desired space vector with another space vector to avoid creating an undesired space vector. The main advantage of this technique is that, without adding any legs, switches, or triode for alternating currents (TRIAC) to the converter circuit, and without the need for complex calculations, the open switch faults are tolerated and the value of overcurrent and total harmonic distortion (THD) caused by the open switch faults on the healthy and faulty phases are reduced. Finally, the proposed fault-tolerant technique is evaluated by MATLAB simulation and the results of this simulation show its effectiveness.
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